Use C++11 'nullptr' where applicable.

[ginac.git] / ginsh / ginsh_parser.ypp

diff --git a/ginsh/ginsh_parser.ypp b/ginsh/ginsh_parser.ypp
index 2bdfc491b4c6b286a1003cc00db963e5b6db2a7e..4813f63a37de2410a4f2af11d2a407bf21de35a9 100644 (file)
--- a/ginsh/ginsh_parser.ypp
+++ b/ginsh/ginsh_parser.ypp
@@ -90,7 +90,7 @@ typedef ex (*fcnp)(const exprseq &e);
 typedef ex (*fcnp2)(const exprseq &e, int serial);
 
 struct fcn_desc {
-       fcn_desc() : p(NULL), num_params(0), is_ginac(false), serial(0) {}
+       fcn_desc() : p(nullptr), num_params(0), is_ginac(false), serial(0) {}
        fcn_desc(fcnp func, int num) : p(func), num_params(num), is_ginac(false), serial(0) {}
        fcn_desc(fcnp2 func, int num, int ser) : p((fcnp)func), num_params(num), is_ginac(true), serial(ser) {}
 
@@ -647,7 +647,7 @@ static const fcn_init builtin_fcns[] = {
        {"transpose", f_transpose, 1},
        {"unassign", f_unassign, 1},
        {"unit", f_unit, 2},
-       {NULL, f_dummy, 0}           // End marker
+       {nullptr, f_dummy, 0}        // End marker
 };
 
 struct fcn_help_init {
@@ -685,7 +685,7 @@ static const fcn_help_init builtin_help[] = {
        {"H", "harmonic polylogarithm"},
        {"Order", "order term function (for truncated power series)"},
        {"Derivative", "inert differential operator"},
-       {NULL, NULL}    // End marker
+       {nullptr, nullptr}  // End marker
 };
 
 #include "ginsh_extensions.h"
@@ -840,7 +840,7 @@ static char *fcn_generator(const char *text, int state)
                if (strncmp(fcn_name, text, len) == 0)
                        return strdup(fcn_name);
        }
-       return NULL;
+       return nullptr;
 }
 
 #ifdef HAVE_LIBREADLINE
@@ -923,7 +923,7 @@ int main(int argc, char **argv)
        file_list = argv + 1;
        if (num_files) {
                yyin = fopen(*file_list, "r");
-               if (yyin == NULL) {
+               if (yyin == nullptr) {
                        cerr << "Can't open " << *file_list << endl;
                        exit(1);
                }